Dyfyniad APA

Whittaker, A. (1985). Field geologist's training guide. International Human Resources Development Corporation.

Dyfyniad Arddull Chicago

Whittaker, Alun. Field Geologist's Training Guide. Boston: International Human Resources Development Corporation, 1985.

Dyfyniad MLA

Whittaker, Alun. Field Geologist's Training Guide. International Human Resources Development Corporation, 1985.

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