Cita APA (7a ed.)

Hoelscher, R. P., & Beverly Mays, A. (1934). Basic units in mechanical drawing. J. Wiley and sons.

Cita Chicago Style (17a ed.)

Hoelscher, Randolph Philip, y Arthur Beverly Mays. Basic Units in Mechanical Drawing. New York: J. Wiley and sons, 1934.

Cita MLA (9a ed.)

Hoelscher, Randolph Philip, y Arthur Beverly Mays. Basic Units in Mechanical Drawing. J. Wiley and sons, 1934.