Lua APA (7ú heag.)

Grey, M. J. (1999). Games entrepreneurs play. Manila Times.

Lua i Stíl Chicago (17ú heag.)

Grey, Margaret Jao. "Games Entrepreneurs Play." Manila Times 1999.

Lua MLA (9ú heag.)

Grey, Margaret Jao. "Games Entrepreneurs Play." Manila Times, 1999.

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