The invisible intruder /
by Carolyn Keene.
APA Citation
Keene, C. (1969). The invisible intruder. New York: Grosset & Dunlap.
MLA Citation
Keene, Carolyn. The Invisible Intruder. New York: Grosset & Dunlap, 1969.
Warning: These citations may not always be complete (especially for serials).