APA

Hartley N., . (1977). The Viking process. New York: Avon Books.

Chicago

Hartley Norman, . 1977. The Viking process. New York: Avon Books.

Harvard

Hartley N., . (1977). The Viking process. New York: Avon Books.

MLA

Hartley Norman, . The Viking process. New York: Avon Books. 1977.