Ettala, T., Kreula, M., & Tähtinen, H. (1978). The effect of sulphur deficiency and sulphur fertilisation on the nitrogen compounds of timothy. Scientific Agricultural Society of Finland.
Chicago Style (17th ed.) CitationEttala, Terttu, Matti Kreula, and Hilkka Tähtinen. The Effect of Sulphur Deficiency and Sulphur Fertilisation on the Nitrogen Compounds of Timothy. Scientific Agricultural Society of Finland, 1978.
MLA (9th ed.) CitationEttala, Terttu, et al. The Effect of Sulphur Deficiency and Sulphur Fertilisation on the Nitrogen Compounds of Timothy. Scientific Agricultural Society of Finland, 1978.
Warning: These citations may not always be 100% accurate.