APA

Keller P., . (1982). Getting at the core: curricular reform at Harvard. Cambridge, Mass: Harvard University Press.

Chicago

Keller Phyllis, . 1982. Getting at the core: curricular reform at Harvard. Cambridge, Mass: Harvard University Press.

Harvard

Keller P., . (1982). Getting at the core: curricular reform at Harvard. Cambridge, Mass: Harvard University Press.

MLA

Keller Phyllis, . Getting at the core: curricular reform at Harvard. Cambridge, Mass: Harvard University Press. 1982.