APA

Challinor J., . (1973). A dictionary of geology. Cardiff: University Wales Press.

Chicago

Challinor John, . 1973. A dictionary of geology. Cardiff: University Wales Press.

Harvard

Challinor J., . (1973). A dictionary of geology. Cardiff: University Wales Press.

MLA

Challinor John, . A dictionary of geology. Cardiff: University Wales Press. 1973.