Cita APA (7a ed.)

365746 Penna, C. V. (1970). The planning of library and documentation services. Unesco.

Cita Chicago Style (17a ed.)

365746 Penna, C. V. The Planning of Library and Documentation Services. Unesco, 1970.

Cita MLA (9a ed.)

365746 Penna, C. V. The Planning of Library and Documentation Services. Unesco, 1970.