Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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