Leermakers, E. T.; Moreira, E. M.; Kiefte-De Jong, J. C.; Darweesh, S. K.; Visser, T; Voortman, T; Bautista, P. K.; Chowdhury, R; Gorman, D (2015). "Effects of choline on health across the life course: A systematic review". Nutrition Reviews. 73 (8): 500–22. doi:10.1093/nutrit/nuv010. PMID26108618.
Andrew P. Abbott; Glen Capper; David L. Davies; Raymond K. Rasheed; Vasuki Tambyrajah (2003). "Novel solvent properties of choline chloride/urea mixtures". Chemical Communications (1): 70–71. doi:10.1039/b210714g.
Leermakers, E. T.; Moreira, E. M.; Kiefte-De Jong, J. C.; Darweesh, S. K.; Visser, T; Voortman, T; Bautista, P. K.; Chowdhury, R; Gorman, D (2015). "Effects of choline on health across the life course: A systematic review". Nutrition Reviews. 73 (8): 500–22. doi:10.1093/nutrit/nuv010. PMID26108618.
"Choline". Micronutrient Information Center, Linus Pauling Institute, Oregon State University, Corvallis, Oregon. February 2015. Dicapai pada 10 January 2017.