APA

Keirstead B. S., . (1942). Essentials of price theory. Toronto: The University of Toronto Press.

Chicago

Keirstead Burton Seely, . 1942. Essentials of price theory. Toronto: The University of Toronto Press.

Harvard

Keirstead B. S., . (1942). Essentials of price theory. Toronto: The University of Toronto Press.

MLA

Keirstead Burton Seely, . Essentials of price theory. Toronto: The University of Toronto Press. 1942.