APA

Tapp B. A., Watkins J. R., . (1990). Energy and mineral resource systems. Cambridge [u.a.]: Cambridge Univ. Press.

Chicago

Tapp B A, Watkins J R, . 1990. Energy and mineral resource systems. Cambridge [u.a.]: Cambridge Univ. Press.

Harvard

Tapp B. A., Watkins J. R., . (1990). Energy and mineral resource systems. Cambridge [u.a.]: Cambridge Univ. Press.

MLA

Tapp B A, Watkins J R, . Energy and mineral resource systems. Cambridge [u.a.]: Cambridge Univ. Press. 1990.