APA (7th ed.) Citation

Nielsen, K. L., & Vanlonkhuyzen, J. H. (1954). Plane & Spherical trigonometry. Barnes & Noble.

Chicago Style (17th ed.) Citation

Nielsen, Kaj Leo, and John H. Vanlonkhuyzen. Plane & Spherical Trigonometry. New York: Barnes & Noble, 1954.

MLA (8th ed.) Citation

Nielsen, Kaj Leo, and John H. Vanlonkhuyzen. Plane & Spherical Trigonometry. Barnes & Noble, 1954.

Warning: These citations may not always be 100% accurate.