APA

Roberts J. R., . (1990). The Gunsmith. New York: Jove Books.

Chicago

Roberts J R, . 1990. The Gunsmith. New York: Jove Books.

Harvard

Roberts J. R., . (1990). The Gunsmith. New York: Jove Books.

MLA

Roberts J R, . The Gunsmith. New York: Jove Books. 1990.