Cita APA

(1956). Kjeldhal distillation apparatus: Instructions 553. American Instruments Co..

Citación estilo Chicago

Kjeldhal Distillation Apparatus: Instructions 553. Silver Spring, Maryland: American Instruments Co., 1956.

Cita MLA

Kjeldhal Distillation Apparatus: Instructions 553. Silver Spring, Maryland: American Instruments Co., 1956.