Cita APA (7th ed.)

Richardson, D. J., & Richardson, K. E. (2008). A laboratory guide to the natural world. Prentice Hall Pearson Education.

Cita Chicago (17th ed.)

Richardson, Dennis J., i Kristen E. Richardson. A Laboratory Guide to the Natural World. Upper Saddle River, NJ: Prentice Hall Pearson Education, 2008.

Cita MLA (9th ed.)

Richardson, Dennis J., i Kristen E. Richardson. A Laboratory Guide to the Natural World. Prentice Hall Pearson Education, 2008.