Cita APA (7a ed.)

Poortman, J. (1965). Philosophy, theosophy, parapsychology: Some essays on diverse subjects. A.W. Sythoff.

Cita Chicago Style (17a ed.)

Poortman, J.J. Philosophy, Theosophy, Parapsychology: Some Essays on Diverse Subjects. Leyden: A.W. Sythoff, 1965.

Cita MLA (8a ed.)

Poortman, J.J. Philosophy, Theosophy, Parapsychology: Some Essays on Diverse Subjects. A.W. Sythoff, 1965.