Dyfyniad APA
Mukerjee, P. K. (1997). A Textbook of geology (13th ed.). World Press.
Dyfyniad Arddull Chicago
Mukerjee, Pratip Kumar. A Textbook of Geology. 13th ed. Kolkata: World Press, 1997.
Dyfyniad MLA
Mukerjee, Pratip Kumar. A Textbook of Geology. 13th ed. World Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.