Cita APA (7th ed.)

Pomeroy, L. R. Cycles of essential elements. Dowden, Hutchinson.

Cita Chicago (17th ed.)

Pomeroy, Lawrence R. Cycles of Essential Elements. Stroudsburg, Pennsylvania: Dowden, Hutchinson.

Cita MLA (9th ed.)

Pomeroy, Lawrence R. Cycles of Essential Elements. Dowden, Hutchinson.