APA-Zitierstil (7. Ausg.)

Walling, D. R. (1993). English as a second language: 25 questions and answers. Phi Delta Kappa Educational Foundation.

Chicago-Zitierstil (17. Ausg.)

Walling, Donovan R. English as a Second Language: 25 Questions and Answers. Bloomington, Ind: Phi Delta Kappa Educational Foundation, 1993.

MLA-Zitierstil (9. Ausg.)

Walling, Donovan R. English as a Second Language: 25 Questions and Answers. Phi Delta Kappa Educational Foundation, 1993.