APA (7e ed.) Bronvermelding
Ballard, E. G. (1971). Philosophy at the crossroads. Louisiana State University Press.
Chicago (17e ed.) Bronvermelding
Ballard, Edward G. Philosophy at the Crossroads. Baton Rouge: Louisiana State University Press, 1971.
MLA (9e ed.) Bronvermelding
Ballard, Edward G. Philosophy at the Crossroads. Louisiana State University Press, 1971.
Let op: Deze citaties zijn niet altijd 100% accuraat.