Gaya APA

C., D, J, D, ;, H, S. (1979). Programmed learning aid for retailing modern concepts and practices (ed. 3). Homewood ill: RICHARD D. IRWIN.

Gaya MLA

C., Delbert, J., Duncan, ;, Hollander,, Stanley. "Programmed learning aid for retailing modern concepts and practices". ed. 3 Homewood ill: RICHARD D. IRWIN, 1979. Text.