Gaya APA

Fairservis, W, A. (1975). The Treshold of cevilization: an experiment in prehistory / Walter A.Fairservis . : Charles Scribners.

Gaya MLA

Fairservis, Walter, A.. "The Treshold of cevilization: an experiment in prehistory / Walter A.Fairservis". : Charles Scribners, 1975. Tadris Matematika.