Gaya APA

Ellis, J, R., Hartley, C, L. (1992). Nursing in Today's World: challenges, issues, and Trends . USA: J. B Lippincott Company.

Gaya MLA

Ellis, Janice, R.., Hartley, Celia, L.. "Nursing in Today's World: challenges, issues, and Trends". USA: J. B Lippincott Company, 1992. Buku Text.