Tutor profile: Brian L.

How can I break links to other workbooks in Microsoft Excel? I want to get rid of the warning messages that I have links to another workbook that can no longer be found.

First, select 'Edit Links' under the Data tab and break links by using the dialogue box that appears. Second, you may need to search for cells that use Data Validation rules that may refer to an external workbook. To find these cells, select 'Find', 'Go To', and then 'Special'. Next, select that you would like to find cells with data validation.

What are some of the most common grammar mistakes I can avoid?

First, be sure to review comma rules before proofreading your paper. For example, a comma is not enough to join two independent clauses together into a compound sentence. You would need a coordinating conjunction in addition to the comma. Second, confirm that your subjects and verbs agree. For example, if your subject is plural, you should not have a singular verb, such as "is" or "walks".

How can I tell if an Internet source for an essay citation is reliable?

First, confirm whether the article includes information about the date of publication, the author, and the author's organization. Second, look for recently-published material, especially if you are searching for an APA citation. Third, looking at the quality of the Site (such as the presence of spelling errors) is another way to tell how reliable the source is. Fourth, check to see if other publications reference the source.