Gaya APA

DAMMGEN, U, [, A. (2013). Estimate of methane, volatile solids and nitrogen excretion rates of german suckler cows . Germay: Institut Bundesallee.

Gaya MLA

DAMMGEN, Ulrich, [et., Al.]. "Estimate of methane, volatile solids and nitrogen excretion rates of german suckler cows". Germay: Institut Bundesallee, 2013. Artikel.