Dyfyniad APA

SKINNER, B. J. (1987). Physical Geology / Brian J. Skinner. John Wiley & Sons.

Dyfyniad Arddull Chicago

SKINNER, Brian J. Physical Geology / Brian J. Skinner. John Wiley & Sons, 1987.

Dyfyniad MLA

SKINNER, Brian J. Physical Geology / Brian J. Skinner. John Wiley & Sons, 1987.

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