Look at context clues in your sources
You need to be more specific when asking questions like this. First of all, you should copy the second paragraph of whatever you are reading. After doing that, you will be able to get a suitable answer for your question.
The answer is B. False. Source cards are index cards which are used to take note all the necessary information about the sources you have used. Source cards only contain the following contents: Author, Title of the Book, Place of Publication, Location of source and source number. Whereas, a library call number appears on a specific part of a book, e.g. spine of book, which are used as codes in order to easily locate the book in the library.
