Cita APA (7a ed.)

Grolier international. (1987). Grolier academic encyclopedia: Vol :15. Grolier international, Acamedic American.

Cita Chicago Style (17a ed.)

Grolier international. Grolier Academic Encyclopedia: Vol :15. USA: Grolier international, Acamedic American, 1987.

Cita MLA (9a ed.)

Grolier international. Grolier Academic Encyclopedia: Vol :15. Grolier international, Acamedic American, 1987.