APA (7th ed.) Citation

Wright, J. (1986). The outcrop quiz: A picture book of puzzles for geology students of all ages. Allen & Unwin.

Chicago Style (17th ed.) Citation

Wright, John. The Outcrop Quiz: A Picture Book of Puzzles for Geology Students of All Ages. London ; Boston: Allen & Unwin, 1986.

MLA (8th ed.) Citation

Wright, John. The Outcrop Quiz: A Picture Book of Puzzles for Geology Students of All Ages. Allen & Unwin, 1986.