Bond, O. F. 1. . . . e., & Castillo, C. 1. . . . e. (1949). Graded Spanish readers. Alternate series. Books 1. Heath.
芝加哥风格引文Bond, Otto Ferdinand 1885- ed, 与 Carlos 1890- ed Castillo. Graded Spanish Readers. Alternate Series. Books 1. Boston: Heath, 1949.
MLA引文Bond, Otto Ferdinand 1885- ed, 与 Carlos 1890- ed Castillo. Graded Spanish Readers. Alternate Series. Books 1. Heath, 1949.
警告：这些引文格式不一定是100％准确.