APA (7th ed.) Citation

Hales, R., & Hales, N. (1990). Learning tree, 1, 2, 3 [one, two, three]: Maths. Cherrytree Books a subsidiary of The Chivers Co.

Chicago Style (17th ed.) Citation

Hales, Richard, and Nicky Hales. Learning Tree, 1, 2, 3 [one, Two, Three]: Maths. Bath: Cherrytree Books a subsidiary of The Chivers Co, 1990.

MLA (9th ed.) Citation

Hales, Richard, and Nicky Hales. Learning Tree, 1, 2, 3 [one, Two, Three]: Maths. Cherrytree Books a subsidiary of The Chivers Co, 1990.