APA (7th ed.) Citation

Jelitto, L., & Schacht, W. (1990). Hardy herbaceous perennials (3. ed., rev.). Timber Press.

Chicago Style (17th ed.) Citation

Jelitto, Leo, and Wilhelm Schacht. Hardy Herbaceous Perennials. 3. ed., rev. Portland, Or: Timber Press, 1990.

MLA (9th ed.) Citation

Jelitto, Leo, and Wilhelm Schacht. Hardy Herbaceous Perennials. 3. ed., rev. Timber Press, 1990.