APA

Steinbeck J., . (1989). The Grapes of warth. London: David campbell.

Chicago

Steinbeck John, . 1989. The Grapes of warth. London: David campbell.

Harvard

Steinbeck J., . (1989). The Grapes of warth. London: David campbell.

MLA

Steinbeck John, . The Grapes of warth. London: David campbell. 1989.