APA

Yorkey R., . (1970). Study skills for students of English as a second language. New York: McGraw-Hill.

Chicago

Yorkey Richard, . 1970. Study skills for students of English as a second language. New York: McGraw-Hill.

Harvard

Yorkey R., . (1970). Study skills for students of English as a second language. New York: McGraw-Hill.

MLA

Yorkey Richard, . Study skills for students of English as a second language. New York: McGraw-Hill. 1970.