APA引文
Billings, J. D. (2001). Hardtack and coffee. Digital Scanning.
Chicago Style (17th ed.) Citation
Billings, John Davis. Hardtack and Coffee. Scituate, Mass.: Digital Scanning, 2001.
MLA引文
Billings, John Davis. Hardtack and Coffee. Digital Scanning, 2001.
警告:這些引文格式不一定是100%准確.