APA

Simpson W., Ekenstam B. a. & Ernolv C. (1973). No more mistakes. An informal guide to correct English. Stockholm: [Prisma].

Chicago

Simpson WG, Ekenstam B af and Ernolv C. 1973. No more mistakes. An informal guide to correct English. Stockholm: [Prisma].

Harvard

Simpson W., Ekenstam B. a. and Ernolv C. (1973). No more mistakes. An informal guide to correct English. Stockholm: [Prisma].

MLA

Simpson WG, Ekenstam B af and Ernolv C. No more mistakes. An informal guide to correct English. Stockholm: [Prisma]. 1973.