Gaya APA

Read, H, , , , , , , , , H., Watson, J. (1975). Inroduction to geology vol. 2 Earth History (1975). : London : Macmillan,.

Gaya MLA

Read, H, , , , , , , , , H.., Watson, Janet. "Inroduction to geology vol. 2 Earth History". 1975 : London : Macmillan,, 1975. Text.