Cita APA (7a ed.)
Heffernan, H. (1953). SCIENCE IN CALIFORNIA'S ELEMENTARY SCHOOL PROGRAM. Science Education, 37(4), 223-226.
Cita Chicago Style (17a ed.)
Heffernan, Helen. "SCIENCE IN CALIFORNIA'S ELEMENTARY SCHOOL PROGRAM." Science Education 37, no. 4 (1953): 223-226.
Cita MLA (9a ed.)
Heffernan, Helen. "SCIENCE IN CALIFORNIA'S ELEMENTARY SCHOOL PROGRAM." Science Education, vol. 37, no. 4, 1953, pp. 223-226.
Precaución: Estas citas no son 100% exactas.