Cita APA (7th ed.)

Roa, M. L. (1993). Environmental science activities kit. Center for Applied Research in Education.

Cita Chicago (17th ed.)

Roa, Michael L. Environmental Science Activities Kit. West Nyack, N.Y: Center for Applied Research in Education, 1993.

Cita MLA (9th ed.)

Roa, Michael L. Environmental Science Activities Kit. Center for Applied Research in Education, 1993.