APA-viite (7. p.)

Marckwardt, A. H. (1951). Introduction to the English language. [s.n..

Chicago-viite (17. p.)

Marckwardt, Albert H. Introduction to the English Language. New York: [s.n., 1951.

MLA-viite (8. p.)

Marckwardt, Albert H. Introduction to the English Language. [s.n., 1951.