APA-viite (7. p.)

European Telecommunications Standards Institute. (1994). European digital cellular telecommunications system (phase 2): Modulation (GSM 05.04) (Version 4.0.3.). The Institute.

Chicago-viite (17. p.)

European Telecommunications Standards Institute. European Digital Cellular Telecommunications System (phase 2): Modulation (GSM 05.04). Version 4.0.3. Valbonne, France: The Institute, 1994.

MLA-viite (8. p.)

European Telecommunications Standards Institute. European Digital Cellular Telecommunications System (phase 2): Modulation (GSM 05.04). Version 4.0.3. The Institute, 1994.

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