APA (7th ed.) Citation

Jaffar A. Al-Tawfiq & Ziad A. Memish. The Hajj 2019 Vaccine Requirements and Possible New Challenges. Springer.

Chicago Style (17th ed.) Citation

Jaffar A. Al-Tawfiq and Ziad A. Memish. The Hajj 2019 Vaccine Requirements and Possible New Challenges. Springer.

MLA (9th ed.) Citation

Jaffar A. Al-Tawfiq and Ziad A. Memish. The Hajj 2019 Vaccine Requirements and Possible New Challenges. Springer.

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