Cita APA (7th ed.)

Gregg, J. R., & Leslie, L. A. (1964). Gregg speed building. McGraw - Hill.

Cita Chicago (17th ed.)

Gregg, John R., i Louis A. Leslie. Gregg Speed Building. New York: McGraw - Hill, 1964.

Cita MLA (9th ed.)

Gregg, John R., i Louis A. Leslie. Gregg Speed Building. McGraw - Hill, 1964.