Willits, C. O., & Hills, C. H. Maple sirup producers manual (Rev. June 1965, slightly rev. July 1976.).
Chicago Style (17th ed.) CitationWillits, C. O., and Claude H. Hills. Maple Sirup Producers Manual. Rev. June 1965, slightly rev. July 1976.
MLA (9th ed.) CitationWillits, C. O., and Claude H. Hills. Maple Sirup Producers Manual. Rev. June 1965, slightly rev. July 1976.
Warning: These citations may not always be 100% accurate.