APA

Queller D. E., . (1967). The office of ambassador in the Middle Ages. Princeton, N.J: Princeton University Press.

Chicago

Queller Donald E, . 1967. The office of ambassador in the Middle Ages. Princeton, N.J: Princeton University Press.

Harvard

Queller D. E., . (1967). The office of ambassador in the Middle Ages. Princeton, N.J: Princeton University Press.

MLA

Queller Donald E, . The office of ambassador in the Middle Ages. Princeton, N.J: Princeton University Press. 1967.