Cita APA (7th ed.)

Wray, D. A., & Cope, F. W. (1948). Geology of Southport and Formby: One-inch geological sheets 74 and 83 new series. H.M.S.O..

Cita Chicago (17th ed.)

Wray, D. A., i F. Wolverson Cope. Geology of Southport and Formby: One-inch Geological Sheets 74 and 83 New Series. London: H.M.S.O., 1948.

Cita MLA (8th ed.)

Wray, D. A., i F. Wolverson Cope. Geology of Southport and Formby: One-inch Geological Sheets 74 and 83 New Series. H.M.S.O., 1948.