APA-čujuhus (7. p.)
Petersen, G. M. (1961). Calculus differential and integral (1a.ed.). Littlefield, Adams and Co..
Chicago-čujuhus (17. p.)
Petersen, G. M. Calculus Differential and Integral. 1a.ed. New Jersey: Littlefield, Adams and Co., 1961.
MLA-čujuhus (9. p.)
Petersen, G. M. Calculus Differential and Integral. 1a.ed. Littlefield, Adams and Co., 1961.
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