APA (7th ed.) Citation

L.G. Marsh. (1965). Let's explore mathematics: Book 3. A & Black.

Chicago Style (17th ed.) Citation

L.G. Marsh. Let's Explore Mathematics: Book 3. London: A & Black, 1965.

MLA (9th ed.) Citation

L.G. Marsh. Let's Explore Mathematics: Book 3. A & Black, 1965.