APA Edition Citation

Grass, G., Hamburger, M., Michael Hamburger, Christopher Middleton, & Middleton, C. (1969). Poems of Günter Grass. Penguin.

Chicago Edition Citation

Grass, Günter, Michael Hamburger, Michael Hamburger, Christopher Middleton, and Christopher Middleton. Poems of Günter Grass. Harmondsworth: Penguin, 1969.

MLA Edition Citation

Grass, Günter, et al. Poems of Günter Grass. Penguin, 1969.