APA

Langan J., . (2011). College writing skills: John Langan. New York: McGraw Hill.

Chicago

Langan John, . 2011. College writing skills: John Langan. New York: McGraw Hill.

Harvard

Langan J., . (2011). College writing skills: John Langan. New York: McGraw Hill.

MLA

Langan John, . College writing skills: John Langan. New York: McGraw Hill. 2011.