APA Alıntı

Sapsford,David, & Ladd,James. (1978). Essential economics. Hart-Davis Educational.

Chicago Stili Alıntı

Sapsford,David, ve Ladd,James. Essential Economics. Great Britain: Hart-Davis Educational, 1978.

MLA Alıntı

Sapsford,David, ve Ladd,James. Essential Economics. Hart-Davis Educational, 1978.