Style de citation APA (7e éd.)

Virola, R. A., De Perio, S. M., & Angeles, E. T. (2000). Environmental accounting in the Philippines: Presented during the User's forum on ENRA. s.n.

Style de citation Chicago (17e éd.)

Virola, Romulo A., Sylvia M. De Perio, et Eduardo T. Angeles. Environmental Accounting in the Philippines: Presented During the User's Forum on ENRA. [S.l: s.n, 2000.

Style de citation MLA (9e éd.)

Virola, Romulo A., et al. Environmental Accounting in the Philippines: Presented During the User's Forum on ENRA. s.n, 2000.