Παραπομπή σε μορφή APA (7η εκδ.)

Hargreaves, R. (2012). How to become a business angel: Practical advice for aspiring investors in unquoted companies. Harriman House Ltd..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hargreaves, Richard. How to Become a Business Angel: Practical Advice for Aspiring Investors in Unquoted Companies. Hampshire: Harriman House Ltd., 2012.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hargreaves, Richard. How to Become a Business Angel: Practical Advice for Aspiring Investors in Unquoted Companies. Harriman House Ltd., 2012.