APA (7th ed.) Citation

Biehringer, H. Present perfect or past tense. Bayer.Schulbuch-Verl.

Chicago Style (17th ed.) Citation

Biehringer, Hans. Present Perfect or Past Tense. München: Bayer.Schulbuch-Verl.

MLA (9th ed.) Citation

Biehringer, Hans. Present Perfect or Past Tense. Bayer.Schulbuch-Verl.

Warning: These citations may not always be 100% accurate.