APA

Johnson-Pynn J., Fragaszy D. M., Hirsh E. M., Brakke K. E. & Greenfield P. M. (19991007). Strategies used to combine seriated cups by chimpanzees (Pan troglodytes), bonobos (Pan paniscus), and capuchins (Cebus apella). : Journal of comparative psychology (Washington, D.C. : 1983).

Chicago

Johnson-Pynn J, Fragaszy D M, Hirsh E M, Brakke K E and Greenfield P M. 19991007. Strategies used to combine seriated cups by chimpanzees (Pan troglodytes), bonobos (Pan paniscus), and capuchins (Cebus apella). : Journal of comparative psychology (Washington, D.C. : 1983).

Harvard

Johnson-Pynn J., Fragaszy D. M., Hirsh E. M., Brakke K. E. and Greenfield P. M. (19991007). Strategies used to combine seriated cups by chimpanzees (Pan troglodytes), bonobos (Pan paniscus), and capuchins (Cebus apella). : Journal of comparative psychology (Washington, D.C. : 1983).

MLA

Johnson-Pynn J, Fragaszy D M, Hirsh E M, Brakke K E and Greenfield P M. Strategies used to combine seriated cups by chimpanzees (Pan troglodytes), bonobos (Pan paniscus), and capuchins (Cebus apella). : Journal of comparative psychology (Washington, D.C. : 1983). 19991007.