APA
Osmer R. R., . (1990). A teachable spirit. Louisville, Ky: Westminster/John Knox Press.
Chicago
Osmer Richard Robert, . 1990. A teachable spirit. Louisville, Ky: Westminster/John Knox Press.
Harvard
Osmer R. R., . (1990). A teachable spirit. Louisville, Ky: Westminster/John Knox Press.
MLA
Osmer Richard Robert, . A teachable spirit. Louisville, Ky: Westminster/John Knox Press. 1990.