Ong, E. G. (1991). Winning in real estate, Philippine style. Worldlink Realty & Management Corporation.
Chicago-referens (17:e uppl.)Ong, Eduardo Gutierrez. Winning in Real Estate, Philippine Style. [S.l.]: Worldlink Realty & Management Corporation, 1991.
MLA-referens (9:e uppl.)Ong, Eduardo Gutierrez. Winning in Real Estate, Philippine Style. Worldlink Realty & Management Corporation, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.