[Collection of astronomical texts].

MLA

Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammad, Lawrence J. Schoenberg and Lawrence J. Schoenberg Collection (University of Pennsylvania). [Collection of astronomical texts]. [between 1500 and 1599?]

APA

Ṭūsī, N., Schoenberg, L. & Lawrence J. Schoenberg Collection (University of Pennsylvania). (1500). [Collection of astronomical texts].

Chicago

Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammad, Lawrence J. Schoenberg and Lawrence J. Schoenberg Collection (University of Pennsylvania). [Collection of astronomical texts]. [between 1500 and 1599?]