O'Neill, R., Anger, L., & Davy, K. (1981). AKL beginning. Longman.
Cita Chicago (17th ed.)O'Neill, Robert, Larry Anger, i Karen Davy. AKL Beginning. New York: Longman, 1981.
Cita MLA (9th ed.)O'Neill, Robert, et al. AKL Beginning. Longman, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.