APA (7th ed.) Citation

Methold, K., & Methold, C. (1978). Puzzles for english practice: PEP 1. Longman.

Chicago Style (17th ed.) Citation

Methold, Kenneth, and Chuntana Methold. Puzzles for English Practice: PEP 1. Londres: Longman, 1978.

MLA (9th ed.) Citation

Methold, Kenneth, and Chuntana Methold. Puzzles for English Practice: PEP 1. Longman, 1978.