APA (7th ed.) Citation

Osborne, M. P., Boyce, N. P., & Molinari, C. China: Land of the emperor's Great Wall.

Chicago Style (17th ed.) Citation

Osborne, Mary Pope, Natalie Pope Boyce, and Carlo Molinari. China: Land of the Emperor's Great Wall.

MLA (8th ed.) Citation

Osborne, Mary Pope, et al. China: Land of the Emperor's Great Wall.

Warning: These citations may not always be 100% accurate.