Cita APA (7a ed.)
Raven, R. J., & Calvey, H. (Apr-Jun1977). Achievement on a Test of Piaget's Operative Comprehension as a Function of a Process-Oriented Elementary School Science Program. Science Education, 61(2), 159-167.
Cita Chicago Style (17a ed.)
Raven, Ronald J., y Helen Calvey. "Achievement on a Test of Piaget's Operative Comprehension as a Function of a Process-Oriented Elementary School Science Program." Science Education 61, no. 2 (Apr-Jun1977): 159-167.
Cita MLA (9a ed.)
Raven, Ronald J., y Helen Calvey. "Achievement on a Test of Piaget's Operative Comprehension as a Function of a Process-Oriented Elementary School Science Program." Science Education, vol. 61, no. 2, Apr-Jun1977, pp. 159-167.
Precaución: Estas citas no son 100% exactas.