Cita APA (7th ed.)

Ostler, N. K., & Nielsen, J. T. (1996). Environmental regulations overview. Prentice Hall.

Cita Chicago (17th ed.)

Ostler, Neal K., i John T. Nielsen. Environmental Regulations Overview. Englewood Cliffs, N.J: Prentice Hall, 1996.

Cita MLA (9th ed.)

Ostler, Neal K., i John T. Nielsen. Environmental Regulations Overview. Prentice Hall, 1996.