APA (7th ed.) Citation

Harper, H. H. Book-Lovers, Bibliomaniacs and Book Clubs.

Chicago Style (17th ed.) Citation

Harper, Henry Howard. Book-Lovers, Bibliomaniacs and Book Clubs.

MLA (9th ed.) Citation

Harper, Henry Howard. Book-Lovers, Bibliomaniacs and Book Clubs.

Warning: These citations may not always be 100% accurate.