Παραπομπή APA

Kopmeyer, M. R. (1990). How you can get richer quicker! Kopmeyer.

Παραπομπή Chicago Style

Kopmeyer, M. R. How You Can Get Richer Quicker! Louisville, Ky.: Kopmeyer, 1990.

Παραπομπή MLA

Kopmeyer, M. R. How You Can Get Richer Quicker! Kopmeyer, 1990.