How does the structure of marlowe's poem develop central idea of the text

The following ways which are helpful to track sources are: source cards, note cards and electronic options. The answer is option A. Source cards are index cards which contain the name of the author, title of the book, source number, place of publication, and location of source. Note cards are also index cards that contain necessary information related to the source. Electronic options include the computer with internet to search for sources.