Inculding. (1975). The 5000 words of the Ladder Series. American: Ladder Edition.
Trích dẫn kiểu ChicagoInculding. The 5000 Words of the Ladder Series. American: Ladder Edition, 1975.
MLA引文Inculding. The 5000 Words of the Ladder Series. American: Ladder Edition, 1975.
警告:這些引文格式不一定是100%准確.