Gaya APA

Heiniger, A, J., Hillary, S, E. (1993). Spirit of Enterprise : The 1993 Rolex Awards (Cet. 1). Switzerland: Buri International.

Gaya MLA

Heiniger, Andre, J.., Hillary, Sir, Edmund. "Spirit of Enterprise : The 1993 Rolex Awards". Cet. 1 Switzerland: Buri International, 1993. Text.