Cita APA (7th ed.)

Steijn, B. (1997). Training course on soillesless cultivation of vegetables. Novartis.

Cita Chicago (17th ed.)

Steijn, Ben. Training Course on Soillesless Cultivation of Vegetables. Edimburgo: Novartis, 1997.

Cita MLA (9th ed.)

Steijn, Ben. Training Course on Soillesless Cultivation of Vegetables. Novartis, 1997.