Dyfyniad APA

Keller, H., & Silverman, R. (2010). How I would help the world. Swedenborg Foundation Press.

Dyfyniad Arddull Chicago

Keller, Helen, and Ray Silverman. How I Would Help the World. West Chester, Pa.: Swedenborg Foundation Press, 2010.

Dyfyniad MLA

Keller, Helen, and Ray Silverman. How I Would Help the World. Swedenborg Foundation Press, 2010.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.