Blavatsky, H. P. (1921). The secret doctrine: The synthesis of science, religion, and philosophy / by H. P. Blavatsky. The Theosophical Publ. House.
Lua i Stíl Chicago (17ú heag.)Blavatsky, Helena P. The Secret Doctrine: The Synthesis of Science, Religion, and Philosophy / by H. P. Blavatsky. London: The Theosophical Publ. House, 1921.
Lua MLA (8ú heag.)Blavatsky, Helena P. The Secret Doctrine: The Synthesis of Science, Religion, and Philosophy / by H. P. Blavatsky. The Theosophical Publ. House, 1921.
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