APA (7th ed.) Citation

Mayer, F. S. (1972). Why two worlds?: (the relation of physical to spiritual realities) (Repr. of Philadelphia, 1934. Repr.). AMS Pr.

Chicago Style (17th ed.) Citation

Mayer, Fred S. Why Two Worlds?: (the Relation of Physical to Spiritual Realities). Repr. of Philadelphia, 1934. Repr. New York: AMS Pr, 1972.

MLA (9th ed.) Citation

Mayer, Fred S. Why Two Worlds?: (the Relation of Physical to Spiritual Realities). Repr. of Philadelphia, 1934. Repr. AMS Pr, 1972.