Παραπομπή σε μορφή APA (7η εκδ.)

Rowland, C., & Lawson, M. (2012). The permanent portfolio: Harry Browne's long-term investment strategy. Wiley. https://doi.org/10.1002/9781119205180

Παραπομπή σε μορφή Chicago (17η εκδ.)

Rowland, Craig, και Mike Lawson. The Permanent Portfolio: Harry Browne's Long-term Investment Strategy. Hoboken, N.J.: Wiley, 2012. https://doi.org/10.1002/9781119205180.

Παραπομπή σε μορφή MLA (8th εκδ.)

Rowland, Craig, και Mike Lawson. The Permanent Portfolio: Harry Browne's Long-term Investment Strategy. Wiley, 2012. https://doi.org/10.1002/9781119205180.