APA ציטוט

Friend, D. W., Cunningham, H. M., & Nicholson, J. W. G. (1962). The Duration of Farrowing in Relation to the Reproductive Performance of Yorkshire Sows.

Citação norma Chicago

Friend, D. W., H. M. Cunningham, and J. W. G. Nicholson. The Duration of Farrowing in Relation to the Reproductive Performance of Yorkshire Sows. 1962.

ציטוט MLA

Friend, D. W., H. M. Cunningham, and J. W. G. Nicholson. The Duration of Farrowing in Relation to the Reproductive Performance of Yorkshire Sows. 1962.