APA
Clark G. H., . (1986). Clark speaks from the grave. Jefferson, Md. (P.O. Box 169, Jefferson 21755): Trinity Foundation.
Chicago
Clark Gordon Haddon, . 1986. Clark speaks from the grave. Jefferson, Md. (P.O. Box 169, Jefferson 21755): Trinity Foundation.
Harvard
Clark G. H., . (1986). Clark speaks from the grave. Jefferson, Md. (P.O. Box 169, Jefferson 21755): Trinity Foundation.
MLA
Clark Gordon Haddon, . Clark speaks from the grave. Jefferson, Md. (P.O. Box 169, Jefferson 21755): Trinity Foundation. 1986.