Cita APA (7th ed.)

Heffner, R. S. (1969). General phonetics. The University of Wisconsin Press.

Cita Chicago (17th ed.)

Heffner, Roe-Merrill S. General Phonetics. Madison: The University of Wisconsin Press, 1969.

Cita MLA (9th ed.)

Heffner, Roe-Merrill S. General Phonetics. The University of Wisconsin Press, 1969.