APA (7th ed.) Citation

Johnson, P. O. (1930). Curricular problems in science at the college level. University of Minnesota Press.

Chicago Style (17th ed.) Citation

Johnson, Palmer O. Curricular Problems in Science at the College Level. Minneapolis: University of Minnesota Press, 1930.

MLA (9th ed.) Citation

Johnson, Palmer O. Curricular Problems in Science at the College Level. University of Minnesota Press, 1930.