APA引文

Grahn, B. H., Cullen, C. L., & Wolfer, J. (1999). Diagnostic ophthalmology. Multifocal retinopathy of a Great Pyrenees.

Citação norma Chicago

Grahn, B H., C L. Cullen, and J. Wolfer. Diagnostic Ophthalmology. Multifocal Retinopathy of a Great Pyrenees. 1999.

MLA引文

Grahn, B H., C L. Cullen, and J. Wolfer. Diagnostic Ophthalmology. Multifocal Retinopathy of a Great Pyrenees. 1999.

警告：這些引文格式不一定是100％准確.