Cita APA (7th ed.)

Ewington, E. J., Spencer, J., David, & Embry, M. Projects in biology. Routledge & Kegan Paul.c1981.

Cita Chicago (17th ed.)

Ewington, E. J., J. Spencer, David, i Maureen Embry. Projects in Biology. London: Routledge & Kegan Paul.c1981.

Cita MLA (9th ed.)

Ewington, E. J., et al. Projects in Biology. Routledge & Kegan Paul.c1981.