APA (7th ed.) Citation
Soja, G., Samm, T., & Praznik, W. (1993). Leaf nitrogen, photosynthesis and crop productivity in Jerusalem artichoke [Helianthus tuberosus L.]. Forschungszentrum Seibersdorf.
Chicago Style (17th ed.) Citation
Soja, G., T. Samm, and W. Praznik. Leaf Nitrogen, Photosynthesis and Crop Productivity in Jerusalem Artichoke [Helianthus Tuberosus L.]. Seibersdorf: Forschungszentrum Seibersdorf, 1993.
MLA (9th ed.) Citation
Soja, G., et al. Leaf Nitrogen, Photosynthesis and Crop Productivity in Jerusalem Artichoke [Helianthus Tuberosus L.]. Forschungszentrum Seibersdorf, 1993.
Warning: These citations may not always be 100% accurate.