APA (7th ed.) Citation

(1978). U.S.A. Plant Visits, 1977-1978.

Chicago Style (17th ed.) Citation

U.S.A. Plant Visits, 1977-1978. 1978.

MLA (9th ed.) Citation

U.S.A. Plant Visits, 1977-1978. 1978.

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