Authored by Sheila Ackerlind and Rebecca Jones-Kellogg, 'Portuguese. A Reference Manual 'is a comprehensive guide on the functioning of oral and written Portuguese, designed to support the study of Portuguese as a foreign language. Originally conceived for university-level students, this book, which presents an extensive description of different domains of knowledge of the language, is a useful support tool for students of various levels of education, teachers of Portuguese as a foreign language and other specialists interested in consulting updated and well-founded information on Portuguese. In different sections of the manual, the contents are presented following a methodology of contrastive analysis with Spanish and English. Therefore, it is expected that the users of this manual have background knowledge of these two languages.