APA (7th ed.) Citation

Portsmouth Library (Portsmouth, N.H.), Gale (Firm), & Melcher, J. Rules and catalogue of the Portsmouth Library.

Chicago Style (17th ed.) Citation

Portsmouth Library (Portsmouth, N.H.), Gale (Firm), and John Melcher. Rules and Catalogue of the Portsmouth Library.

MLA (9th ed.) Citation

Portsmouth Library (Portsmouth, N.H.), et al. Rules and Catalogue of the Portsmouth Library.

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