Dyfyniad APA

Penna, C. V., Sewell, P. H., & Liebaers, H. (1970). The planning of library and documentation services (2d ed. rev. and enl.). Unesco.

Dyfyniad Arddull Chicago

Penna, Carlos Víctor, Philip Hooper Sewell, and Herman Liebaers. The Planning of Library and Documentation Services. 2d ed. rev. and enl. Paris: Unesco, 1970.

Dyfyniad MLA

Penna, Carlos Víctor, et al. The Planning of Library and Documentation Services. 2d ed. rev. and enl. Unesco, 1970.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.