Blavatsky, H. P. (1921). The secret doctrine: The synthesis of science, religion, and philosophy / by H. P. Blavatsky. The Theosophical Publ. House.
Chicago-referens (17:e uppl.)Blavatsky, Helena P. The Secret Doctrine: The Synthesis of Science, Religion, and Philosophy / by H. P. Blavatsky. London: The Theosophical Publ. House, 1921.
MLA-referens (8:e uppl.)Blavatsky, Helena P. The Secret Doctrine: The Synthesis of Science, Religion, and Philosophy / by H. P. Blavatsky. The Theosophical Publ. House, 1921.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.