APA (7th ed.) Citation

Howells, J. (1998). Trouble free clematis: The viticellas. Garden Art Pr.

Chicago Style (17th ed.) Citation

Howells, John. Trouble Free Clematis: The Viticellas. Woodbridge, Suffolk: Garden Art Pr, 1998.

MLA (9th ed.) Citation

Howells, John. Trouble Free Clematis: The Viticellas. Garden Art Pr, 1998.

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