Citazione Stile APA (7a Edizione)

Christaller, W. (1966). Central places in Southern Germany. Prentice - Hall.

Citazione stile Chigago Style (17a edizione)

Christaller, Walter. Central Places in Southern Germany. Englewood .Cliffs N. J.: Prentice - Hall, 1966.

Citatione MLA (9a ed.)

Christaller, Walter. Central Places in Southern Germany. Prentice - Hall, 1966.