haikal anuar adnan, zarinah arshat, nurul saidatus shaja'ah ahmad shahril.  (2022).  a cross-sectional study of malaysian low-income drug addict wives: relationship between family impact, coping and mental wellbeing.  - f1000 research.  1-14. 

nurul saidatus shaja'ah ahmad shahril, zarinah arshat, haikal anuar adnan.  (2022).  parental stress and depression symptoms among b40 wives of drug addicts in malaysia: resilience as mediator.  - f1000 research.  1-15. 

suzana mohd hoesni, haikal anuar adnan, najwa afiqa roshaizad.  (2020).  a preliminary study on the relationship between death anxiety, spiritual well-being and the meaning of life among individuals living in klang valley, malaysia.  - international journal of psychosocial rehabilitation.  4130-4139. 

haikal anuar adnan, khadijah alavi, amran hassan, daniella maryam mokhtar.  (2020).  scientific research publishing.  - creative education.  2580-2593. 

daniella m. mokhtar, mohd syazwan zainal, mohd haikal anuar adnan.  (2019).  potential factors of presenteeism: job demands, work engagement & job insecurity.  - international journal of academic research in progressive education and development.  900-911.