Gaya APA

Persen, L, N. (,197). Rock dynamics and geophyical exploration introduction to stress in rocks (1975). : New York : Elsevier Science Publishing Company.

Gaya MLA

Persen, Leif, N. "Rock dynamics and geophyical exploration introduction to stress in rocks". 1975 : New York : Elsevier Science Publishing Company, ,197. Text.