Gaya APA

Mills, B, J, T, I, C, B, D, H, L, D, A, C. (1971). British Regional Geology Northern England (Fourth Edition) . : T. Eastwood.

Gaya MLA

Mills, B., J., Taylor,, I., C., Burgess,, D., H., Land,, D., A., C.. "British Regional Geology Northern England (Fourth Edition)". : T. Eastwood, 1971. Text.