Cita APA (7th ed.)

Gregg, J. R. (1979). Gregg speed building. McGraw-Hill.

Cita Chicago (17th ed.)

Gregg, John Robert. Gregg Speed Building. New York: McGraw-Hill, 1979.

Cita MLA (9th ed.)

Gregg, John Robert. Gregg Speed Building. McGraw-Hill, 1979.