Gaya APA

Bingham, R, C., Walstad, W, B. (1990). Study Guide to Accompany Mcconnell, Brue Economics Ed. 11 (Ke-11). Amerika: McGraw Hill.

Gaya MLA

Bingham, Robert, C.., Walstad, William, B.. "Study Guide to Accompany Mcconnell, Brue Economics Ed. 11". Ke-11 Amerika: McGraw Hill, 1990. Text.