Nielsen, K. L., & Vanlonkhuyzen, J. H. (1954). Plane and spherical trigonometry (3a. ed.). Barnes & Noble.
Chicago Style (17th ed.) CitationNielsen, Kaj L., and John H. Vanlonkhuyzen. Plane and Spherical Trigonometry. 3a. ed. Nueva York: Barnes & Noble, 1954.
MLA (9th ed.) CitationNielsen, Kaj L., and John H. Vanlonkhuyzen. Plane and Spherical Trigonometry. 3a. ed. Barnes & Noble, 1954.
Warning: These citations may not always be 100% accurate.