APA (7th ed.) Citation

Flower, J., & Berman, M. (1989). Build up your vocabulary 2. Language Teaching Publications.

Chicago Style (17th ed.) Citation

Flower, John, and Michael Berman. Build Up Your Vocabulary 2. England: Language Teaching Publications, 1989.

MLA (9th ed.) Citation

Flower, John, and Michael Berman. Build Up Your Vocabulary 2. Language Teaching Publications, 1989.

Warning: These citations may not always be 100% accurate.