APA (7th ed.) Citation

Juarroz, R., Merwin, W. S., & Wald, S. (1977). Vertical poems. Kayak Books.

Chicago Style (17th ed.) Citation

Juarroz, Roberto, W. S. Merwin, and Susana Wald. Vertical Poems. Santa Cruz, Calif.: Kayak Books, 1977.

MLA (8th ed.) Citation

Juarroz, Roberto, et al. Vertical Poems. Kayak Books, 1977.