Παραπομπή σε μορφή APA (7η εκδ.)

Walter, W. G. (1969). Observations on man, his frame, his duty and his expectations: The twenty-third Arthur Stanley Eddington memorial lecture, delivered at Cambridge University, 7 November 1969. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Walter, William Grey. Observations on Man, His Frame, His Duty and His Expectations: The Twenty-third Arthur Stanley Eddington Memorial Lecture, Delivered at Cambridge University, 7 November 1969. London: Cambridge University Press, 1969.

Παραπομπή σε μορφή MLA (9th εκδ.)

Walter, William Grey. Observations on Man, His Frame, His Duty and His Expectations: The Twenty-third Arthur Stanley Eddington Memorial Lecture, Delivered at Cambridge University, 7 November 1969. Cambridge University Press, 1969.