Gaya APA

Porter, A, G., Rezmer, M, G. (1984). BASIC Business Subroutines for the Apple II and II e . Canada: Addison Welsey Publishing Company.

Gaya MLA

Porter, Alan, G.., Rezmer, Martin, G.. "BASIC Business Subroutines for the Apple II and II e". Canada: Addison Welsey Publishing Company, 1984. Text.