 Śāntideva’s two works have quite different structures. The BCA is organized into chapters and verses, and will be cited accordingly here: so BCA III.24 is the twenty-fourth verse of the third chapter. The ŚS also contains many verses, including twenty-seven “root verses” that express important themes of the book, and numerous others composed by Śāntideva or quoted from sources; but these verses are scattered unevenly through a quite long prose text. The now-standard way to cite passages from the ŚS uses page numbers from the nearly complete Sanskrit manuscript discovered by Bendall; so a passage found at ŚS 36 would be one that was originally found on page 36 of that manuscript. Vaidya’s edition of the Sanskrit ŚS provides the reader with these standard page numbers, and so do both complete English translations.