APA

Toppen D. L., . (1985). FORTH. New York, NY: [McGraw-Hill].

Chicago

Toppen David L, . 1985. FORTH. New York, NY: [McGraw-Hill].

Harvard

Toppen D. L., . (1985). FORTH. New York, NY: [McGraw-Hill].

MLA

Toppen David L, . FORTH. New York, NY: [McGraw-Hill]. 1985.