APA (7th ed.) Citation

Pick, M., Picha, J., & Vyskocil, V. (1973). Theory of the earth's gravity field. Elsevier Scientific.

Chicago Style (17th ed.) Citation

Pick, Milos, Jan Picha, and Vincenc Vyskocil. Theory of the Earth's Gravity Field. Amsterdam: Elsevier Scientific, 1973.

MLA (9th ed.) Citation

Pick, Milos, et al. Theory of the Earth's Gravity Field. Elsevier Scientific, 1973.