APA (7th ed.) Citation

Mahnke K. Kathleen & Duffy C. Carolyn. (1998). The Heinemann elt TOEFL: Preparation Course. Oxford, Heinemann, 1998.

Chicago Style (17th ed.) Citation

Mahnke K. Kathleen and Duffy C. Carolyn. The Heinemann Elt TOEFL: Preparation Course. Oxford, Heinemann, 1998, 1998.

MLA (9th ed.) Citation

Mahnke K. Kathleen and Duffy C. Carolyn. The Heinemann Elt TOEFL: Preparation Course. Oxford, Heinemann, 1998, 1998.

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