Gaya APA

Cambell, M, R, -, P, N. (1990). Macro Economics : Principles, Problems, And Bolicles . amerika: Mc Graw- Hill Book Co.

Gaya MLA

Cambell, McConnell, R, -, Personal, Name. "Macro Economics : Principles, Problems, And Bolicles". amerika: Mc Graw- Hill Book Co, 1990. Text.