APA (7e ed.) Bronvermelding

Semer-Purzycki, J. (1989). A practical guide to travel fares and ticketing. Delmar Publishers.

Chicago (17e ed.) Bronvermelding

Semer-Purzycki, Jeanne. A Practical Guide to Travel Fares and Ticketing. Albany, N.Y: Delmar Publishers, 1989.

MLA (9e ed.) Bronvermelding

Semer-Purzycki, Jeanne. A Practical Guide to Travel Fares and Ticketing. Delmar Publishers, 1989.