APA

Cohen M. A., . (1987). The teenagers guide to study, travel, and adventu. New York: St. Martins Press.

Chicago

Cohen Marjorie A, . 1987. The teenagers guide to study, travel, and adventu. New York: St. Martins Press.

Harvard

Cohen M. A., . (1987). The teenagers guide to study, travel, and adventu. New York: St. Martins Press.

MLA

Cohen Marjorie A, . The teenagers guide to study, travel, and adventu. New York: St. Martins Press. 1987.