Gaya APA

Kiekhofer, W, H. (1951). Economic Principles Problems and Policies . New York-Amerika Serikat: New York.Appleton-Century. Crofts.

Gaya MLA

Kiekhofer, William, H.. "Economic Principles Problems and Policies". New York-Amerika Serikat: New York.Appleton-Century. Crofts, 1951. Koleksi Elektronik.