APA引文

Helbock, R. W. (1993). Western post offices. La Posta Publications.

Chicago Style (17th ed.) Citation

Helbock, Richard W. Western Post Offices. Lake Oswego, OR: La Posta Publications, 1993.

MLA引文

Helbock, Richard W. Western Post Offices. La Posta Publications, 1993.

警告：這些引文格式不一定是100％准確.