Παραπομπή APA

Eggers, M. A., & Tussing, A. D. (1965). Level of economic activity. Holt, Rinehart and Winston.

Παραπομπή Chicago Style

Eggers, Melvin A., και A. Dale Tussing. Level of Economic Activity. New York: Holt, Rinehart and Winston, 1965.

Παραπομπή MLA

Eggers, Melvin A., και A. Dale Tussing. Level of Economic Activity. Holt, Rinehart and Winston, 1965.