Cita APA (7a ed.)

National Training Laboratories, Washington, DC, & National Training Laboratories. (1958). Research training series. NTL.

Cita Chicago Style (17a ed.)

National Training Laboratories, Washington, DC, y National Training Laboratories. Research Training Series. Washington, D.C: NTL, 1958.

Cita MLA (8a ed.)

National Training Laboratories, Washington, DC, y National Training Laboratories. Research Training Series. NTL, 1958.