Dyfyniad APA

Clifford, M. H., Dear, . I., Harvey, C., & Wolf, E. Pictorical encyclopedia of scientific knowledge. Sampson Low, Martson & Co.

Dyfyniad Arddull Chicago

Clifford, Montagu H., I.S Dear, Charles Harvey, and E.S Wolf. Pictorical Encyclopedia of Scientific Knowledge. London: Sampson Low, Martson & Co.

Dyfyniad MLA

Clifford, Montagu H., et al. Pictorical Encyclopedia of Scientific Knowledge. Sampson Low, Martson & Co.

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