Cita APA (7a ed.)

Brätter, P., & Schramel, P. (1987). Trace element analytical chemistry in medicine and biology. Walter de Gruyter.

Cita Chicago Style (17a ed.)

Brätter, Peter, y Peter Schramel. Trace Element Analytical Chemistry in Medicine and Biology. Berlin [etc.]: Walter de Gruyter, 1987.

Cita MLA (9a ed.)

Brätter, Peter, y Peter Schramel. Trace Element Analytical Chemistry in Medicine and Biology. Walter de Gruyter, 1987.