Dyfyniad APA

Lanczos, C. (1977). Variational principles of mechanics .-4thed (4th ed.). University of Toronto Press.

Dyfyniad Arddull Chicago

Lanczos, Cornelius. Variational Principles of Mechanics .-4thed. 4th ed. Toronto: University of Toronto Press, 1977.

Dyfyniad MLA

Lanczos, Cornelius. Variational Principles of Mechanics .-4thed. 4th ed. University of Toronto Press, 1977.

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