Gaya APA

Hermanson, Roger H., Reynolds, Llyod G.. (1973). Programmed Learning Aid For Principles Of Economics . Illinois: Richard D. Irwin.

Gaya Chicago

Hermanson, Roger H., Reynolds, Llyod G.. Programmed Learning Aid For Principles Of Economics. Illinois: Richard D. Irwin, 1973. .

Gaya MLA

Hermanson, Roger H., Reynolds, Llyod G.. Programmed Learning Aid For Principles Of Economics. Illinois: Richard D. Irwin, 1973. .

Gaya Turabian

Hermanson, Roger H., Reynolds, Llyod G.. Programmed Learning Aid For Principles Of Economics. Illinois: Richard D. Irwin, 1973. .