APA استشهاد

(1992). Periodic health examination, 1992 update: 2. Routine prenatal ultrasound screening. Canadian Task Force on the Periodic Health Examination.

استشهاد بنمط شيكاغو

Periodic Health Examination, 1992 Update: 2. Routine Prenatal Ultrasound Screening. Canadian Task Force On the Periodic Health Examination. 1992.

MLA استشهاد

Periodic Health Examination, 1992 Update: 2. Routine Prenatal Ultrasound Screening. Canadian Task Force On the Periodic Health Examination. 1992.

تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.