APA (7th ed.) Citation

Riddle, J., & Ingpen, R. (2003). Marco Polo: 13th-Century Italian trader. Mason Crest Publishers.

Chicago Style (17th ed.) Citation

Riddle, John, and Robert Ingpen. Marco Polo: 13th-Century Italian Trader. Pennsylvania: Mason Crest Publishers, 2003.

MLA (9th ed.) Citation

Riddle, John, and Robert Ingpen. Marco Polo: 13th-Century Italian Trader. Mason Crest Publishers, 2003.