APA

Pember G. H., . (19). Earth's earliest ages and their connection with modern spiritualism and theosophy. New York: Fleming H. Revell company.

Chicago

Pember G H, . 19. Earth's earliest ages and their connection with modern spiritualism and theosophy. New York: Fleming H. Revell company.

Harvard

Pember G. H., . (19). Earth's earliest ages and their connection with modern spiritualism and theosophy. New York: Fleming H. Revell company.

MLA

Pember G H, . Earth's earliest ages and their connection with modern spiritualism and theosophy. New York: Fleming H. Revell company. 19.