APA (7th ed.) Citation

FRIEDRICHSEN & Wolpers. (1977). Manual of laboratory methods of plant and soil analysis. Marihat Research Station.

Chicago Style (17th ed.) Citation

FRIEDRICHSEN and Wolpers. Manual of Laboratory Methods of Plant and Soil Analysis. Pematang Siantar, Indonesia: Marihat Research Station, 1977.

MLA (9th ed.) Citation

FRIEDRICHSEN and Wolpers. Manual of Laboratory Methods of Plant and Soil Analysis. Marihat Research Station, 1977.