Gaya APA

Koffman, E, B., Friedman, F, L. (1984). Problem Solving in Structured BASIC-PLUS and VAX-11 BASIC . California: Addison-Wesley Publishing Company.

Gaya MLA

Koffman, Elliot, B.., Friedman, Frank, L.. "Problem Solving in Structured BASIC-PLUS and VAX-11 BASIC". California: Addison-Wesley Publishing Company, 1984. Text.