Higgins, P., & Hansen, D. (2013). Cornelia M. Ruland and Shirley M. Moore: Peaceful End of Life Theory. Mosby/Elsevier. https://oaks.kent.edu/node/3662
Higgins, Patricia, and Dana Hansen. 2013. “Cornelia M. Ruland and Shirley M. Moore: Peaceful End of Life Theory”. Mosby/Elsevier. https://oaks.kent.edu/node/3662.
Higgins, P., and D. Hansen. Cornelia M. Ruland and Shirley M. Moore: Peaceful End of Life Theory. Mosby/Elsevier, 1 Jan. 2013, https://oaks.kent.edu/node/3662.