APA (7th ed.) Citation

Harker, A. (1926). Notes on geological map-reading (2d ed.). W. Heffer & sons, limited.

Chicago Style (17th ed.) Citation

Harker, Alfred. Notes on Geological Map-reading. 2d ed. Cambridge, Eng.: W. Heffer & sons, limited, 1926.

MLA (9th ed.) Citation

Harker, Alfred. Notes on Geological Map-reading. 2d ed. W. Heffer & sons, limited, 1926.