Cita APA (7a ed.)

Pollzien, G. M., & Langen, E. (1973). International licensing agreements (2nd ed.). Bobbs-Merrill.

Cita Chicago Style (17a ed.)

Pollzien, Götz M., y Eugen Langen. International Licensing Agreements. 2nd ed. Indianapolis [etc.]: Bobbs-Merrill, 1973.

Cita MLA (9a ed.)

Pollzien, Götz M., y Eugen Langen. International Licensing Agreements. 2nd ed. Bobbs-Merrill, 1973.