Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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