Gotthelf, A., & Salmieri, G. (2016). A companion to Ayn Rand. Wiley Blackwell.
Lua i Stíl Chicago (17ú heag.)Gotthelf, Allan, agus Gregory Salmieri. A Companion to Ayn Rand. West Sussex, England: Wiley Blackwell, 2016.
Lua MLA (9ú heag.)Gotthelf, Allan, agus Gregory Salmieri. A Companion to Ayn Rand. Wiley Blackwell, 2016.
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