APA

Gayer A., . (1951). Basic economics. New York: Prentice-Hall.

Chicago

Gayer A, . 1951. Basic economics. New York: Prentice-Hall.

Harvard

Gayer A., . (1951). Basic economics. New York: Prentice-Hall.

MLA

Gayer A, . Basic economics. New York: Prentice-Hall. 1951.