Citazione Stile APA (7a Edizione)

Gulick, E. V. (1973). Peter Parker and the opening of China. Harvard University Press.

Citazione stile Chigago Style (17a edizione)

Gulick, Edward V. Peter Parker and the Opening of China. Cambridge, Mass: Harvard University Press, 1973.

Citatione MLA (9a ed.)

Gulick, Edward V. Peter Parker and the Opening of China. Harvard University Press, 1973.