1977Elements of British and American English. (Revised and enlarged edition 1989.) Warsaw: Polish Scientific Publishers.
Peters, Frank and Swan Toril
1983American English: A Handbook and Sociolinguistic Perspective. Oslo: Novus.
Zuengler, Jane
1985English, Swahili, or Other Languages? The Relation of Educational Development Goals to Language of Instruction in Kenya and Tanzania. In Nessa Wolfson and Joan Manes (eds.), Language and Inequality. Berlin: Mouton de Gruyter, 241–254.